▎ 摘　　要

NOVELTY - Preparation of molybdenum disulfide (MoS2)-reduced graphene oxide (RGO)-preoxidized nickel foam (NiO/Ni) hydrogen evolution composite material by sol soaking coating includes dissolving molybdenum compound, sulfur compound and non-ionic surfactant in deionized water, transferring into polytetrafluoroethylene-lined stainless steel high-pressure reaction kettle, treating hydrothermally, washing obtained MoS2 with deionized water, centrifuging and drying in vacuum; preparing RGO by treating natural graphite powder with improved Hummer process; dissolving polyethylene glycol (PEG) surfactant in hot deionized water, dissolving MoS2, dispersing RGO, and performing ultrasonic treatment to form stable suspension sol; immersing nickel foam in solution containing oxidant to obtain NiO/Ni foam; immersing in suspension sol, pulling drying and repeating from immersing to drying; and placing in tube furnace, roasting under protective atmosphere and cooling. USE - The method is for preparation of MoS2-RGO-NiO/Ni foam hydrogen evolution composite material by sol soaking coating. ADVANTAGE - The method prepares composite material being subjecting to electrochemical performance and hydrogen production performance tests by electrochemical workstation and xenon lamp, which showed good photocatalytic hydrogen decomposition performance and catalytic stability. DETAILED DESCRIPTION - The method includes dissolving molybdenum compound, sulfur compound and non-ionic surfactant in 120 mL of deionized water at weight ratio of 2-10:4-12:1 under constant stirring, transferring into polytetrafluoroethylene-lined stainless steel high-pressure reaction kettle, treating hydrothermally at 140-200 degrees C for 16-36 hours, washing obtained MoS2 with deionized water, centrifuging and drying in vacuum; preparing RGO by treating natural graphite powder with improved Hummer process; dissolving PEG surfactant in hot deionized water, dissolving MoS2, dispersing RGO, and performing ultrasonic treatment for 30 minutes to form stable suspension sol at mass ratio of 100 mL deionized water to PEG, MoS2 and RGO at 10:0.1-1.0:0.02-0.2; immersing nickel foam in 0.2-1.0 M solution containing oxidant for 20-50 minutes to obtain NiO/Ni foam; immersing in suspension sol for 1-4 minutes, pulling at 1 mm/s, drying at 60 degrees C, and repeating immersing, pulling and drying process by 3-8 times; and placing in tube furnace, roasting at 300-600 degrees C under protective atmosphere, switching to protective gas with certain reducing atmosphere, keeping for 1-3 hours and cooling naturally to room temperature to obtain composite material with required load.